1978512 has 40 divisors (see below), whose sum is σ = 5225856. Its totient is φ = 644736.

The previous prime is 1978507. The next prime is 1978523. The reversal of 1978512 is 2158791.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1818 + ... + 2694.

2^1978512 is an apocalyptic number.

1978512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2612928).

1978512 is an abundant number, since it is smaller than the sum of its proper divisors (3247344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1978512 is a wasteful number, since it uses less digits than its factorization.

1978512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935 (or 929 counting only the distinct ones).

The product of its digits is 5040, while the sum is 33.

The square root of 1978512 is about 1406.5958907945. The cubic root of 1978512 is about 125.5392595807.

The spelling of 1978512 in words is "one million, nine hundred seventy-eight thousand, five hundred twelve".